Low-additive uranium alloys for the fuel elements of the KS-150 reactor

The investigations showed a high resistance to swelling in an alloy of uranium with small amounts of aluminium and chromium at a burnup value of ∼1 at.%. The hot-working scheme for the alloy, including γ hardening of the solid solution, α annealing (aging), and β hardening, ensured the formation of a fine-grained isotropic structure with a finely dispersed distribution of second-phase particles, which facilitated the effective utilization of the alloying additives in limiting the cavitation and vacancy swelling of the uranium.